各向异性浮力紊流的显式代数应力模型及其验证  

An Explicit Algebraic Reynolds Stress Model for Anisotropic Buoyant Turbulent Flows

作　　者：赖锡军[1] 王志东[2] 汪德爟[3] 

机构地区：[1]中国科学院地理与湖泊研究所湖泊室,江苏南京210008 [2]华东船舶工业学院船舶与海洋工程学院,江苏镇江212003 [3]河海大学环境学院,江苏南京210098

出　　处：《计算物理》2006年第2期177-183,共7页Chinese Journal of Computational Physics

摘　　要：在Wallin&Johansson的显式代数雷诺应力模型(EARSM)基础上,引入浮力的紊动效应,使该模型能够反映浮力对紊流运动的影响.利用同位网格上的SIMPLEC算法,模拟了T-型连接管内的温度混合流动.与实验资料和DNS计算结果比较表明,提出的模型能够反映各向异性的浮力紊流特征,而且模型在计算进程中显示出良好的数值收敛性能,与涡粘性两方程模型的计算花费相当.An explicit algebraic Reynolds stress model （EARSM） proposed by Wallin ＆ Johansson was extended to simulate anisotropic buoyant turbulent flows. The collocated finite volume method was applied to solve the Navier-Stokes equations and the pressure coupling was treated in the SIMPLEC algorithm. A turbulent thermal mixing in T-junction flows was simulated to validate the model, A comparison with experiments and Fukushima et al＇s DNS results shows that the present model captures the characteristics of anisotropic buoyant turbulent flows. Meanwhile, the computation shows excellent numerical stability and the computation cost is only slightly higher than that of the eddy-viscosity turbulence model.

关 键 词：浮力流 紊流模型 显式代数应力模型 T-型管流 

分 类 号：O35[理学—流体力学]